脱硫装置正常开车通常有（）个操作程序。A.六 B.八 C.十 D.十二

ZP—89型移频自动闭塞构成的双线单向三显示自动闭塞当FS发生故障时能自动改由副发送盘（）发送。

Poor families in some countries spend as much as eighty percent of their money on food. Rising prices in recent months have created the worst food crisis(危机) in more than thirty years. The United Nations World Food Program says high food prices could push one hundred million people into hunger.

Nathan Childs is an expert on rice markets. He notes that the harvest for the latest growing season was the largest on record. But India, Vietnam and others have restricted exports(限制出口) to keep prices down at home and protect supplies.

Thailand’s agriculture minister says his country will never restrict rice exports. He told the Reuters news agency Thursday that Thailand has enough supplies to meet demand at home and for export.

Thailand is the world’s largest rice exporter. Recent signs of an increase in supplies have helped ease record prices for Thai rice. Prices rose last week above one thousand dollars a ton.

Vietnam, the second biggest exporter, has banned(禁止) exports until June. And Vietnamese officials have now warned that non-food traders who buy rice for speculation(投机活动)will be severely punished.

Some experts say speculation is a necessary part of market activity. But the head of the U.N. Environment Program blames it for the high food prices. “We have enough food on this planet today to feed everyone.” Achim Steiner told the Associated Press.

Earlier, a member of the United States Commodity Futures Trading Commission didn’t accept the idea that speculators are the main cause. Bart Chilton blamed reduced harvests and grain supplies and the falling value of the dollar.

U.N. Secretary General Ban Ki-moon called heads of major international agencies to a meeting this week in the Swiss capital, Bern. He says high food prices could harm world trade, economic growth, social progress and political security.

小题1:What is the main idea of the passage?

A．Vietnam has banned rice exports to other countries.

B．Thailand is the largest rice exporter in the world.

C．Some families are too poor to afford enough food.

D．Rising prices of food have led to the world food crisis.小题2:Which country restricted food exports according to the passage?

A. Thailand.    B. Switzerland.    C. Vietnam.    D. The USA.

小题3:All of the following are the results of rising prices of food EXCEPT ____.

A．the worst food crisis

B．reduced harvests and grain supplies

C．people spending more money on food

D．pushing one hundred million people into hunger小题4:What is the reason for the speculation according to the head of the U.N. Environment Program?

A．High food prices.

B．The falling value of the dollar.

C．Enough rice supplies in some countries.

D．Restricted food exports in some countries.

经典条件反射理论的提出者是_____。

阅读材料，回答问题。

材料一随着近年来国际政治形势的变化，我国面临的外部环境更加复杂，美国对我国与邻国的领土争端妄加干涉。我国沉着冷静，内外并举，坚定地维护国家利益。对外：我国一方面坚定地重申走和平发展道路，积极开展睦邻外交，2013年中越在河内发表《新时期深化中越全面战略合作的联合声明》。对内：不为外部势力所动摇，一心一意谋发展，为实现伟大的“中国梦”迈着坚定的步伐。

材料二在海上对中方企业正常作业进行非法强力干扰的同时，2014年5月中旬，越方还纵容其国内反华游行示威。数千越南不法分子对包括中国在内的多国在越企业进行打砸抢烧，残酷杀害4名并打伤300多名中国在越公民，并造成重大财产损失。越方在海上的挑衅行动，中方保持了高度克制，采取了必要的防范措施，派遣公务船到现场保障作业安全，有效地维护了海上生产作业秩序和航行安全。

派遣公务船到现场保障作业安全，这是我国在行使（）权和（）权。

简述M2M两种应用模式的异同。